我什么时候应该使用结构而不是类? [英] When should I use a struct instead of a class?

问题描述

MSDN 说当你需要轻量级对象时你应该使用结构体.结构优于类时还有其他情况吗?

MSDN says that you should use structs when you need lightweight objects. Are there any other scenarios when a struct is preferable over a class?

有些人可能已经忘记了:

Some people might have forgotten that:

1. 结构可以有方法.
2. 结构不能被继承.

1. structs can have methods.
2. structs cannot be inherited.

我了解结构体和类之间的技术差异，只是我不太清楚何时使用结构体.

I understand the technical differences between structs and classes, I just don't have a good feel for when to use a struct.

推荐答案

MSDN 有答案:在类和结构之间进行选择.

基本上，该页面为您提供了一个 4 项清单，并说除非您的类型符合所有标准，否则请使用类.

Basically, that page gives you a 4-item checklist and says to use a class unless your type meets all of the criteria.

不要定义结构，除非类型具有以下所有内容特点:

Do not define a structure unless the type has all of the following characteristics:

• 它在逻辑上代表一个单一的值，类似于原始类型(整数、双精度等).
• 它的实例大小小于 16 字节.
• 它是不可变的.
• 不必经常装箱.

这篇关于我什么时候应该使用结构而不是类?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！